Finding the Fourth Proportional to 1,207,415.20, 1,811,122.80 and 787,511.20
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Solution
The fourth proportional to 1,207,415.20, 1,811,122.80 and 787,511.20 is: 1,181,266.80
Step by Step Solution
- Step 1: Write the proportion equation
1,207,415.20 : 1,811,122.80 = 787,511.20 : x - Step 2: Convert to fraction form
1,207,415.20/1,811,122.80 = 787,511.20/x - Step 3: Cross multiply
1,207,415.20x = 1,811,122.80 × 787,511.20 - Step 4: Simplify right side
1,207,415.20x = 1,426,279,489,575.36 - Step 5: Solve for x
x = 1,426,279,489,575.36/1,207,415.20 - Step 6: Final answer
x = 1,181,266.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.